用python写迭代器实现学生管理系统中的学生信息访问

很高兴回答你的问题！实现学生管理系统中的学生信息访问，我们可以定义一个Student类和一个StudentsIterator类，通过迭代器遍历学生信息。如下所示：

class Student:
    def __init__(self, name, age, gender, grade):
        self.name = name
        self.age = age
        self.gender = gender
        self.grade = grade

class StudentsIterator:
    def __init__(self, students):
        self.students = students
        self.index = 0
    
    def __next__(self):
        if self.index >= len(self.students):
            raise StopIteration
        student = self.students[self.index]
        self.index += 1
        return student

class Students:
    def __init__(self):
        self.students = []
    
    def add_student(self, student):
        self.students.append(student)
    
    def __iter__(self):
        return StudentsIterator(self.students)

# example usage
students = Students()
students.add_student(Student("Alice", 20, "Female", 90))
students.add_student(Student("Bob", 19, "Male", 85))

for student in students:
    print(student.name)

希望这个例子能够帮到你！如果你还有问题，可以继续问我哦！